On Monday, 6 February 2017 14:47:15 UTC-7, Dominique Laurain wrote: > > Summmary of work done for sagemath ... > > > http://rpm.pbone.net/index.php3/stat/4/idpl/34786687/dir/fedora_other/com/sagemath-data-polytopes_db-7.3-6.fc25.noarch.rpm.html > > (maybe more recent updates?) > > I guess pcpa and Jerry James have done great job decompressing databases, > and coding Python interface (instead of Kreuze's java(?) code) >
Kreuzer's code is C/C++ and part of the reason for their own database format is that it is highly efficient. Sage has plain text databases for 2 and 3 dimensional cases (these are small and available as ReflexivePolytopes(...)) as well as a a HUGE 8GB optional package for 4 dimensional polytopes together with Hodge numbers. I don't think we have some "direct" interface to reading their binary format, when I was working with 4 and 5 dimensional cases I used palp decoder in a pipe, reading polytopes from there. On a very related note, there are recent improvements to the speed of lattice (including reflexive) polytopes that need review: https://trac.sagemath.org/ticket/22309 https://trac.sagemath.org/ticket/22310 Best, Andrey > > Dominique > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
